doc.: IEEE c Submission January 2006 Ali Sadri (Intel Corporation)Slide 1 Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Wireless Display Throughput Requirements] Date Submitted: [January 2006] Source: [Ali Sadri, Alexander Maltsev, Alexei Davydov] Company: [Intel Corporation] Address: [Intel Corporation, Evening Creek Drive,San Diego, CA ,USA ] Abstract: [IMST data analysis,Preliminary results] Purpose:[To provide Preliminary results of the IMST data analysis] Notice:This document has been prepared to assist the IEEE P It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release:The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P

doc.: IEEE c Submission January 2006 Ali Sadri (Intel Corporation)Slide 2 Goals of preliminary data analysis Understand the behavior of indoor mmWave channel under different conditions Determine the basic parameters of the channel from measured data Propose possible channel model candidates

doc.: IEEE c Submission January 2006 Ali Sadri (Intel Corporation)Slide 3 Measurements scenarios Library environment with tables, chairs and metal bookshelves with books 3 main types of measurement scenarios –LOS: unobstructed line of sight conditions –Edge: partially obstructed line of sight by the edge of a metal bookshelf –NLOS: non line of sight obstructed by a densely filled bookshelf 3 types of RX antennas (horn, dipole array antenna, biconical) Fixed TX lens antenna position at the suspended ceiling, RX measurements range ~2-5m Time resolution is 1/960MHz ≈ 1ns

doc.: IEEE c Submission January 2006 Ali Sadri (Intel Corporation)Slide 4 Measurement scenarios plan LOS Edge NLOS

doc.: IEEE c Submission January 2006 Ali Sadri (Intel Corporation)Slide 5 Examples of measured channel impulse responses and PDP curves for LOS (far/near RX positions) Clustering in time due to reflection from neighboring objects ~30 dB Strong LOS component Almost linear in dB scale decay of multipath part

doc.: IEEE c Submission January 2006 Ali Sadri (Intel Corporation)Slide 6 Examples of measured channel impulse responses for Edge scenario Shadow from metal sidewall of bookshelf Fresnel diffraction Penetration from books

doc.: IEEE c Submission January 2006 Ali Sadri (Intel Corporation)Slide 7 Examples of measured channel impulse responses and PDP curves for NLOS Bookshelf gives ~15 dB penetration loss. The attenuation is heterogeneous in space. The main ray is not completely faded.

doc.: IEEE c Submission January 2006 Ali Sadri (Intel Corporation)Slide 8 PDF of rays in multipath region Rayleigh distribution gives good fitting to distribution of measured ray amplitudes in multipath region

doc.: IEEE c Submission January 2006 Ali Sadri (Intel Corporation)Slide 9 Candidates for channel models Tap delay line model with average power profile Channel model with exponential power delay profile for multipath region Saleh-Valenzuela channel model with random amplitude, delay time and angle of arrival of scattered rays

doc.: IEEE c Submission January 2006 Ali Sadri (Intel Corporation)Slide 10 Tap-delay line model: example of PDP for LOS environment Some typical power delay profiles may be used for different scenarios (LOS, NLOS). Fixed time of arrival is assumed for each ray.

doc.: IEEE c Submission January 2006 Ali Sadri (Intel Corporation)Slide 11 Exponential model: Tapped delay line with typical profile Two parameters are required for description (exponent parameter and ratio LOS to NLOS component). May be not accurate because clustering in time was observed Line of site component Non line of site component

doc.: IEEE c Submission January 2006 Ali Sadri (Intel Corporation)Slide 12 Saleh-Valenzuela channel model Impulse response of channel Line of site component Delta function Time arrival of ray k in cluster l Time arrival of cluster l Complex amplitude of multipath channel Notes: 1. Random angle of arrival may be also included in model. 2. Needs some criteria for parameter estimation. Described by Λ parameter in Poisson model Described by λ parameter in Poisson model. In our measurements1 / λ = 1 ns

doc.: IEEE c Submission January 2006 Ali Sadri (Intel Corporation)Slide 13 Summary The preliminary analysis of measured data confirmed theoretical view on mmWave propagation features in indoor environment Three possible channel candidates may capture observed effects Measured data allows to analyze more complex spatial characteristics of mmWave channel (angle of arrival, spatial clustering)